[Zubersoft]

The reason that the slider in the second case has a small solid background is to create separation between the two halves. I tested it with no background, and it was visually unpleasant to have the two halves run directly into each other. While the presence of the slider is an indicator that a half page turn has occurred, there was something unnerving at not being able to completely tell where one half ended and the other began without a small amount of separation. I can consider reducing the height of the background a little if more users indicate that they don't like this.

Mike